#!/bin/sh
# Copyright 2013, Alexis La Goutte (See AUTHORS file)
#
# For git user: copy tools/pre-commit to .git/hooks/ folder and make it
# executable. To bypass it for a single commit, use the --no-verify argument.
# Using --no-verify will then fail during git review because of a missing
# ChangeID. Fix that by running git review -i. Do not use -i during normal
# operation.
#
# Alternatively, invoke it directly with the commit ID. Example for checking the
# last commit:
#
#   tools/pre-commit HEAD~
#
# Relative paths are also supported. For instance, if you are in epan/, then you
# could invoke  `../tools/pre-commit HEAD` to check for changes to staged files.
#
# From
# http://mark-story.com/posts/view/using-git-commit-hooks-to-prevent-stupid-mistakes
#

# If the commit identifier is not given, use HEAD instead.
COMMIT_ID="${1:-HEAD}"

UNAME=$( uname -a )

case "$UNAME" in
    *\ Msys)
        pyvar="pythonw.exe"
        ;;
    *)
        pyvar="python3"
        ;;
esac

PYBIN=${WS_GITHOOK_PYTHON:-$pyvar}

# Path to hook script in the .git directory
hook_script=${GIT_DIR:-.git}/hooks/pre-commit

# Always start in the root directory of the source tree, this allows for
# invocations via relative paths (such as ../tools/pre-commit):
if ! cd "$(git rev-parse --show-toplevel)" ; then
    echo "Can't change to the top-level source directory."
    exit 1
fi

# Check for newer (actually, different) versions of the pre-commit script
# (but only if invoked as hook, i.e. the commit ID is not given as argument).
if [ -z "$1" ] && [ -f "$hook_script" ]; then
    if ! cmp -s "$hook_script" tools/pre-commit; then
        echo "Pre-commit hook script is outdated, please update! (cp tools/pre-commit ${hook_script})"
    fi
fi

exit_status=0

COMMIT_FILES=$( git diff-index --cached --name-status "${COMMIT_ID}" | grep -v "^D" | cut -f2 | grep "\\.[ch]$" )
DIAMETER_FILES=$( git diff-index --cached --name-status "${COMMIT_ID}" | grep -v "^D" | cut -f2 | grep diameter/ )

# Path to filter script in the tools directory
filter_script=${PWD}/tools/pre-commit-ignore.py
filter_conf=${PWD}/tools/pre-commit-ignore.conf

if [ -f "$filter_script" ] && [ -f "$filter_conf" ]; then
    CHECK_FILES=$( echo "$COMMIT_FILES" | "$PYBIN" "$filter_script" "$filter_conf" ) || exit
else
    CHECK_FILES="$COMMIT_FILES"
fi

bad_alloc_patterns=${PWD}/tools/detect_bad_alloc_patterns.py
echo "$COMMIT_FILES" | $PYBIN "$bad_alloc_patterns"

# On windows python will output \r\n line endings - we don't want that.
#
# Do not use sed, as not all versions of sed support \r as meaning CR
# in a regexp - the only version that does so might be GNU sed; the
# GNU sed documentation says that only \n and \\ can be used in a
# portable script.
#
# The Single UNIX Specification says that tr supports \r; most if not
# all modern UN*Xes should support it.
CHECK_FILES=$( echo "$CHECK_FILES" | tr -d '\r' )

for FILE in $CHECK_FILES; do
    # Skip some special cases
    FILE_BASENAME="$( basename "$FILE" )"
    # This should only be done on code that's part of one or more
    # Wireshark programs; idl2wrs.c is a developer tool, not a
    # Wireshark program, so these tests don't apply.
    if test "$FILE_BASENAME" = "idl2wrs.c"
    then
        continue
    fi
    if test "$FILE_BASENAME" = "wmem_test.c"
    then
        continue
    fi

    #Check if checkhf is good
    ./tools/checkhf.pl "$FILE"            || exit_status=1

    #Check if checkAPIs is good
    ./tools/checkAPIs.pl -p "$FILE"       || exit_status=1

    #Check if fix-encoding-args is good
    ./tools/fix-encoding-args.pl "$FILE"  || exit_status=1

    #Check if checkfiltername is good
    ./tools/checkfiltername.pl "$FILE"    || exit_status=1

    # If there are whitespace errors, print the offending file names and fail. (from git pre-commit.sample)
    git diff-index --check --cached "${COMMIT_ID}" "$FILE" || exit_status=1

done

if [ "x$DIAMETER_FILES" != x ]
then
    ./tools/validate-diameter-xml.sh > /dev/null || exit_status=1
fi

exit $exit_status

#
#  Editor modelines
#
#  Local Variables:
#  c-basic-offset: 4
#  tab-width: 8
#  indent-tabs-mode: nil
#  End:
#
#  ex: set shiftwidth=4 tabstop=8 expandtab:
#  :indentSize=4:tabSize=8:noTabs=true:
#
